CFR›Title 7›Subtitle B›Chapter I›Part 51›Subpart II›Subject Group Samples for Grade and Size Determination ContainsSection 51.3200CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 Sections 51.3200 § 51.3200 Samples for grade and size determination. Previous Metric Conversion Table Metric Conversion Table Next Size Classifications Size Classifications